aaPanel_Kern
I added the postfix rule successfully.
But, I want to add a rule for the web server as well.
The first time, it gives to add successfully a rule,
But, I`m getting a log creation error on two conditions:

  1. when I try to edit an exciting rule.
  2. when I delete the rule and try to add the same rule again.

    aaP_esales2000
    WebSite protection Add related sites
    Rule file: /etc/fail2ban/jail.local
    Please do not change it at will, the panel may not be recognized after the change

      aaPanel_Kern
      I notice that if i restart the Apache, i`m getting an error:
      Apache rule configuration error:
      AH00526: Syntax error on line 8 of /www/server/panel/vhost/apache/mydomain.conf:
      CustomLog takes two or three arguments, a file name, a custom log format string or format name, and an optional "env=" or "expr=" clause (see docs)

        some hacker is sending emails from root@mydomain and root@locahost

        May 5 15:46:28 vmi613070 postfix/qmgr[18763]: 4E8C6160062A: removed
        May 5 15:46:28 vmi613070 postfix/local[18768]: C56E71601880: to=<root@localhost>, relay=local, delay=16772, delays=16772/0.52/0/0, dsn=2.0.0, status=sent (delivered to mailbox)
        May 5 15:46:28 vmi613070 postfix/qmgr[18763]: C56E71601880: removed
        May 5 15:46:28 vmi613070 postfix/local[18765]: 0CBA3160072E: to=<root@localhost>, relay=local, delay=26749, delays=26748/0.52/0/0, dsn=2.0.0, status=sent (delivered to mailbox)
        May 5 15:46:28 vmi613070 postfix/qmgr[18763]: 0CBA3160072E: removed
        May 5 15:46:28 vmi613070 postfix/local[18768]: 9DB4D160059E: to=<root@localhost>, relay=local, delay=9583, delays=9583/0.53/0/0, dsn=2.0.0, status=sent (delivered to mailbox)
        May 5 15:46:28 vmi613070 postfix/qmgr[18763]: 9DB4D160059E: removed
        May 5 15:46:28 vmi613070 postfix/local[18767]: 3FCC816007A7: to=<root@localhost>, relay=local, delay=23291, delays=23290/0.53/0/0, dsn=2.0.0, status=sent (delivered to mailbox)
        May 5 15:46:28 vmi613070 postfix/qmgr[18763]: 3FCC816007A7: removed
        May 5 15:46:28 vmi613070 postfix/local[18765]: C346B1600552: to=<root@localhost>, relay=local, delay=34139, delays=34139/0.54/0/0, dsn=2.0.0, status=sent (delivered to mailbox)
        May 5 15:46:28 vmi613070 postfix/qmgr[18763]: C346B1600552: removed
        May 5 15:46:28 vmi613070 postfix/local[18768]: B9B1D16000EB: to=<root@localhost>, relay=local, delay=34140, delays=34139/0.54/0/0.01, dsn=2.0.0, status=sent (delivered to mailbox)
        May 5 15:46:28 vmi613070 postfix/qmgr[18763]: B9B1D16000EB: removed
        May 5 15:46:28 vmi613070 postfix/local[18765]: 95BCF160149C: to=<root@localhost>, relay=local, delay=4029, delays=4029/0.55/0/0, dsn=2.0.0, status=sent (delivered to mailbox)
        May 5 15:46:28 vmi613070 postfix/qmgr[18763]: 95BCF160149C: removed
        May 5 15:46:28 vmi613070 postfix/local[18767]: AFAAE1600113: to=<root@localhost>, relay=local, delay=28708, delays=28708/0.55/0/0.01, dsn=2.0.0, status=sent (delivered to mailbox)
        May 5 15:46:28 vmi613070 postfix/qmgr[18763]: AFAAE1600113: removed
        May 5 15:46:29 vmi613070 postfix/local[18766]: B222B1601485: to=<root@localhost>, relay=local, delay=21982, delays=21981/0.03/0/0.91, dsn=2.0.0, status=sent (delivered to mailbox)
        .....
        May 5 15:46:28 vmi613070 postfix/master[18761]: daemon started -- version 3.4.7, configuration /etc/postfix
        May 5 15:46:28 vmi613070 postfix/qmgr[18763]: warning: /etc/postfix/main.cf, line 707: overriding earlier entry: myhostname=mail.mydomain.com
        May 5 15:46:28 vmi613070 postfix/pickup[18762]: warning: /etc/postfix/main.cf, line 707: overriding earlier entry: myhostname=mail.mydomain.com
        May 5 15:46:28 vmi613070 postfix/qmgr[18763]: 8361616007ED: from=root@vmi613070.hostingdomain.com, size=493, nrcpt=1 (queue active)
        May 5 15:46:28 vmi613070 postfix/trivial-rewrite[18764]: warning: /etc/postfix/main.cf, line 707: overriding earlier entry: myhostname=mail.mydomain.com

        What is the best way to block it?

          aaP_esales2000
          In the Linux system, the root user can send emails by default. However, in order to enhance system security, you can restrict the root user from sending mail by configuring the mail server or changing the settings of the mail client.

          Here are some ways you can restrict the root user from sending mail:

          Configure mail server: You can configure mail server to prevent root user from sending mail. Specifically, you can create a mail filtering rule on the mail server to prevent the root user from sending mail. For example, in a Postfix mail server, you would add the following to the /etc/postfix/main.cf file:

          smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/sender_access

          Then, add the following to the /etc/postfix/sender_access file:

          root REJECT

          This will change mailx's default sender address, preventing root from sending mail.

          Change the email address of the root user: You can change the email address of the root user to prevent the root user from sending emails. For example, on an Ubuntu system, you can edit the /etc/aliases file and change root's email address to a non-real email address:

          root: /dev/null

          This will prevent the root user from sending mail.
          Note that changing the configuration of the root user may affect the normal operation of the system. Therefore, make sure you know what you are doing and back up important data before changing your system configuration.

            When i use
            smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/sender_access

            Im receiving an error while trying to send emails from the primary email account that Im using on my WordPress (info@mydomain.com).
            when I remove the sender restrict option from the config file. then it's working again and I can send emails from info@mydomain.com.
            i didn't check yet if this issue is with all email accounts.

            Mailer: Other SMTP
            SMTP Error: The following recipients failed: someemailaddress@gmail.com: : Sender address rejected: Server configuration error

              Is it possible to send after cancellation?
              It is recommended to check whether the sender email configuration of wordpress is misconfigured?
              Also check whether the ssl of the mail server is configured correctly?
              "mail.135mailtest.com" is replaced with your domain name
              You can use this command to check whether the correct SSL is configured
              openssl s_client -connect mail.135mailtest.com:587 -starttls smtp
              or
              openssl s_client -connect mail.135mailtest.com:465 -starttls smtp

              If the display is not OK, please re-apply for SSL

              aaP_esales2000

                aaPanel_Kern
                Verify return code: 0 (ok)

                The sender email is config correctly and the SSL is also ( using Chain SSL ).

                Can I give you temporary access to the aaPanel?

                  aaPanel_Kern
                  Can you give me a hint on what to look? because it's happening only when I try to reject sending emails from the root.

                  That is the error that I'm receiving

                  Versions:
                  WordPress: 6.0.3
                  WordPress MS: No
                  PHP: 7.4.33
                  WP Mail SMTP: 3.8.0

                  Params:
                  Mailer: smtp
                  Constants: Yes
                  ErrorInfo: SMTP Error: The following recipients failed: recipient@me.com: : Sender address rejected: Server configuration error
                  Host: mail.mydomain.com
                  Port: 465
                  SMTPSecure: ssl
                  SMTPAutoTLS: bool(true)
                  SMTPAuth: bool(true)

                  Server:
                  OpenSSL: OpenSSL 1.0.2u 20 Dec 2019

                  Debug:
                  Email Source: WP Mail SMTP Pro
                  Mailer: Other SMTP
                  PHPMailer was able to connect to SMTP server but failed while trying to send an email.
                  Email Source: WP Mail SMTP Pro
                  Mailer: Other SMTP
                  SMTP Error: The following recipients failed: recipient@me.com: : Sender address rejected: Server configuration error

                  SMTP Debug:
                  2023-05-08 05:33:55 Connection: opening to ssl://mail.mydomain.com:465, timeout=300, options=array()

                  2023-05-08 05:33:55 Connection: opened

                  2023-05-08 05:33:55 SERVER -> CLIENT: 220 mail.mydomain.com ESMTP Postfix (3.4.7)

                  2023-05-08 05:33:55 CLIENT -> SERVER: EHLO tikair.co.il

                  2023-05-08 05:33:55 SERVER -> CLIENT: 250-mail.mydomain.com250-PIPELINING250-SIZE 102400000250-VRFY250-ETRN250-AUTH PLAIN LOGIN250-ENHANCEDSTATUSCODES250-8BITMIME250-DSN250-SMTPUTF8250 CHUNKING

                  2023-05-08 05:33:55 CLIENT -> SERVER: AUTH LOGIN

                  2023-05-08 05:33:55 SERVER -> CLIENT: 334 VXNlcm5hbWU6

                  2023-05-08 05:33:55 CLIENT -> SERVER: [credentials hidden]

                  2023-05-08 05:33:55 SERVER -> CLIENT: 334 UGFzc3dvcmQ6

                  2023-05-08 05:33:55 CLIENT -> SERVER: [credentials hidden]

                  2023-05-08 05:33:55 SERVER -> CLIENT: 235 2.7.0 Authentication successful

                  2023-05-08 05:33:55 CLIENT -> SERVER: MAIL FROM:noreply@mydomain.com

                  2023-05-08 05:33:55 SERVER -> CLIENT: 250 2.1.0 Ok

                  2023-05-08 05:33:55 CLIENT -> SERVER: RCPT TO:recipient@me.com

                  2023-05-08 05:33:55 SERVER -> CLIENT: 451 4.3.5 noreply@mydomain.com: Sender address rejected: Server configuration error

                  2023-05-08 05:33:55 SMTP ERROR: RCPT TO command failed: 451 4.3.5 noreply@mydomain.com: Sender address rejected: Server configuration error

                  2023-05-08 05:33:55 CLIENT -> SERVER: QUIT

                  2023-05-08 05:33:55 SERVER -> CLIENT: 221 2.0.0 Bye

                  2023-05-08 05:33:55 Connection: closed

                  SMTP Error: The following recipients failed: recipient@me.com: noreply@mydomain.com: Sender address rejected: Server configuration error

                  That my mail config

                  readme_directory = /usr/share/doc/postfix3-3.4.7/README_FILES
                  meta_directory = /etc/postfix
                  shlib_directory = /usr/lib/postfix
                  virtual_mailbox_domains = sqlite:/etc/postfix/sqlite_virtual_domains_maps.cf
                  virtual_alias_maps = sqlite:/etc/postfix/sqlite_virtual_alias_maps.cf, sqlite:/etc/postfix/sqlite_virtual_alias_domain_maps.cf, sqlite:/etc/postfix/sqlite_virtual_alias_domain_catchall_maps.cf
                  virtual_mailbox_maps = sqlite:/etc/postfix/sqlite_virtual_mailbox_maps.cf, sqlite:/etc/postfix/sqlite_virtual_alias_domain_mailbox_maps.cf
                  smtpd_sasl_type = dovecot
                  smtpd_sasl_path = private/auth
                  smtpd_sasl_auth_enable = yes
                  smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination
                  smtpd_use_tls = yes
                  smtp_tls_security_level = may
                  smtpd_tls_security_level = may
                  virtual_transport = lmtp:unix:private/dovecot-lmtp
                  message_size_limit = 102400000
                  smtpd_milters = inet:127.0.0.1:11332
                  non_smtpd_milters = inet:127.0.0.1:11332
                  milter_protocol = 6
                  milter_default_action = accept
                  default_process_limit = 100
                  smtpd_client_connection_count_limit = 10
                  smtpd_client_connection_rate_limit = 30
                  queue_minfree = 20971520
                  header_size_limit = 51200
                  smtpd_recipient_limit = 400
                  #smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/sender_access

                  smtpd_tls_chain_files = /www/server/panel/plugin/mail_sys/cert/mydomain.com/privkey.pem,/www/server/panel/plugin/mail_sys/cert/mydomain.com/fullchain.pem
                  tls_server_sni_maps = hash:/etc/postfix/vmail_ssl.map

                  milter_mail_macros = i {mail_addr} {client_addr} {client_name} {auth_authen}

                    aaP_esales2000
                    Hello, is it normal for Send mail to use the relevant user to send mail in the mail server?
                    Is it normal to add a # comment to the configuration of milter_mail_macros and restart postfix?

                      Hello, can you give us your aapanel information? The server first makes a snapshot backup, if possible, please send it to kern@aapanel.com.
                      It is recommended to fill in the following content
                      Post link:
                      SSH IP address, account password and port:
                      aapanel login link address and account password:
                      Website background login information:
                      Email account information:

                      If there is no post link, it will not be possible to know which user's information it is, and the problem will not be processed

                      aaP_esales2000